How can we prevent the complication of diabetes and tuberculosis? For diabetic patients to be alert to complications of tuberculosis: 1. Diabetic patients with negative tuberculin test should be vaccinated with BCG vaccine, especially for adolescents and children with diabetes. Those who are strongly positive for tuberculin test should be treated with chemoprophylaxis. 2.Diabetic patients should have regular chest X-ray for timely detection and early treatment of tuberculosis. 3. In the course of diabetes treatment, chest X-ray should be done promptly if the following conditions occur: ① unstable blood sugar or unsatisfactory control; ② wasting and weight loss; ③ tuberculosis poisoning symptoms and respiratory symptoms appear. 4, elderly diabetes mellitus, juvenile diabetes mellitus, more attention should be paid to the complication of tuberculosis. Patients with pulmonary tuberculosis should be alert to complications of diabetes: 1. Patients diagnosed with pulmonary tuberculosis should routinely have their blood glucose checked for early detection of asymptomatic invisible diabetes. 2, tuberculosis patients with significant appetite or weight gain and unsatisfactory symptomatic improvement in chemotherapy should promptly check blood sugar and urine sugar, and those with suspicious blood sugar should do glucose tolerance test or glycosylated hemoglobin measurement for early detection of invisible diabetes. 3. Patients with pulmonary tuberculosis who repeatedly have skin boils, pubic itching, lung lesions showing predominantly cheese exudate, columnar erosion cavities, and deterioration or recurrence of regular chemotherapy should be alerted to complications of diabetes mellitus.